Ada Health
Free AI symptom checker that suggests possible conditions and where to seek care.
Overview
Ada Health: a symptom checker built like a medical device
Ada Health is an AI symptom-assessment platform from Berlin-based Ada Health GmbH: answer a series of adaptive questions about what you are feeling and it returns possible condition matches plus triage guidance — self-care, see a doctor, or seek urgent care. Founded in 2011 by Daniel Nathrath, Dr. Claire Novorol, and Prof. Martin Hirsch, and launched as a consumer app in 2016, Ada reached more than 11 million registered users and 24 million completed assessments by 2022. The consumer app is entirely free; the business sells enterprise integrations for care navigation and clinical triage to health systems, insurers, and pharma.
What separates Ada from a WebMD-style checklist is regulatory and clinical depth: its medical knowledge base is curated by in-house clinicians, and the product is a CE-marked Class IIa medical device in the EU with ISO 27001 and EN ISO 13485 certifications.
Key Features
- AI symptom assessment with adaptive, clinician-reviewed question flows
- Triage guidance on how urgently to seek care after each assessment
- Medical library with condition information
- Available in English, German, Spanish, Portuguese, Swahili, and Romanian
- Enterprise care-navigation and clinical-decision-support integrations
- CE Class IIa medical device; ISO 27001 and EN ISO 13485 certified
Ideal Use Case
A person with new, non-emergency symptoms who wants a structured, medically grounded read on what might be going on and whether it warrants a doctor's visit — in their own language, without an appointment. For health systems and insurers, Ada works as a white-label front door that routes patients to the right level of care.
How Ada Health differentiates
Against WebMD Symptom Checker and Buoy Health, Ada carries formal medical-device certification and a quality system most consumer checkers lack. A 2020 BMJ Open comparison of eight symptom-assessment apps ranked Ada highest on condition coverage and accuracy — with the caveat that Ada co-authored the study. Production credibility: a $120M Series B led by Leaps by Bayer, and enterprise partners including Sutter Health, Bayer, Pfizer, Novartis, Takeda, and AXA.
FAQ
Is Ada Health free? Yes — the consumer app is completely free with no premium tier. Revenue comes from enterprise licensing.
Does Ada Health give a diagnosis? No. Ada provides possible causes and urgency guidance and consistently directs users to clinicians; studies show symptom checkers remain below physician accuracy for triage.
What platforms does Ada Health support? iOS, Android, and web-based assessments, in six languages.
How does Ada Health handle my data? Ada Health GmbH is a German company subject to GDPR, ISO 27001 certified, and its assessment product is regulated as a Class IIa medical device in the EU.
tl;dr
Ada Health is the free, clinician-built AI symptom checker with real regulatory teeth — CE-marked, enterprise-deployed by major health systems and pharma, and among the most-studied symptom-assessment apps available.
Related
Looking for more options? Browse the Healthcare directory or read our best AI healthcare tools listicle. Ada Health is also tracked on Crunchbase.
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